Coordination Control of Static Var Compensator and Onload Tap Changer Transformerby Using Fuzzy Logic
| Autor: | Kun-Yeh Lin, 林昆燁 |
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| Rok vydání: | 2011 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 99 In this study, the goal is to investigate the power quality problems that occur in a Taipower’s primary substation system (P/S), where the P/S feeds electric power to several steel-making customers. Recently, due to the operations of these EAF loads, it is observed that serious voltage fluctuations occurred at the bus that connected to the P/S transformers. The on-load tap changers (OLTCs) of the transformers have thus frequently switched on and off, which deteriorate the transformer life and also affect the supply power quality. This study analyzes the power quality impact of severely load variations on the feeder under the area where has several steel industry customers. It uses simulation techniques and accurate equipment models to test the simulation, and assess the effects of installing SVC to support the installation of SVC in the existing area. In order to improve the switching situation of OLTC, this study adopts the fuzzy control for OLTC and SVC coordination. And it explores the relation between the OLTC operation and the voltage flicker to clarify the result of OLTC malfunction. Finally, it assesses the power quality of a primary substation with large arc furnace loads. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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